/Engine/Source/Runtime/Slate/Public/Framework/Commands/UICommandList.h
Calls the GetCheckState delegate to see if the visualization of this command in a multibox should appear checked
ECheckBoxState GetCheckState ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< const [FUICommandInfo](API\Runtime\Slate\Framework\Commands\FUICommandInfo) > InUICommandInfo ) const